There will be a server maintenance on 04/28/2017 at 4PM PDT. This maintenance will be to implement a couple of changes including an optimization update. Update notes will be posted once the maintenance is complete.

They don't pre-post patch notes because if something goes wrong during the uploading process, then they've just made themselves less trust worthy.

Which would you assume they'd get a worse back-lash for.

Not posting notes, until maint is nearly over, but we all know what was successfully changed before we log in.

Or pre-posting notes, and once in a while, something decides to bug up or have an issue, and gets pulled from the update to allow the rest to finish, but they've also just said something was going to be there, then reneged on that statement.